Growth, Structure, and Phase Behavior of Di-tert-butyl-para-terphenyl CrystalsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:The results of studying the growth of para-terphenyl derivative (4,4"-di-tert-butyl-para-terphenyl(tBu-3P-tBu)) crystals are presented. The solubility of this compound in toluene at 20°С has been establishedby spectrophotometry. Using the techniques of growth from solutions and physical vapor transport,tBu-3P-tBu single crystals up to 1 cm long have been obtained for the first time. Their structure at 85 K hasbeen interpreted in the triclinic system, sp. gr. P1 (Z = 8), using single-crystal X-ray diffraction. Flat rectangular crystals with the best morphological characteristics have been grown from vapor. The developed face ofthese crystals exhibits elementary growth steps 1.4 nm high, corresponding to molecular monolayers orientedin the (001) plane. The presence of a polymorphic transition at 229.2°C and mesomorphic liquid crystalphase above the melting temperature (255.6°С) is found.